<template>
  <div class="popupSelect-container">
    <div class="el-select" @click.stop="openDialog">
      <div v-if="multiple" class="el-select__tags" ref="tags" :style="{ 'max-width': inputWidth - 32 + 'px', width: '100%',cursor:'pointer' }">
        <span v-if="collapseTags && tagsList.length">
          <el-tag :closable="!selectDisabled" :size="collapseTagSize" type="info" disable-transitions @close="deleteTag($event, 0)">
            <span class="el-select__tags-text">{{ tagsList[0].fullName }}</span>
          </el-tag>
          <el-tag v-if="tagsList.length > 1" :closable="false" type="info" disable-transitions>
            <span class="el-select__tags-text">+ {{ tagsList.length - 1 }}</span>
          </el-tag>
        </span>
        <transition-group v-if="!collapseTags" @after-leave="resetInputHeight">
          <el-tag v-for="(item,i) in tagsList" :key="item.id" :size="collapseTagSize" :closable="!selectDisabled" type="info" disable-transitions @close="deleteTag($event, i)">
            <span class="el-select__tags-text">{{ item.fullName }}</span>
          </el-tag>
        </transition-group>
      </div>
      <el-input ref="reference" v-model="innerValue" type="text" :placeholder="currentPlaceholder" :disabled="selectDisabled" readonly :validate-event="false" :tabindex="(multiple) ? '-1' : null" @mouseenter.native="inputHovering = true" @mouseleave.native="inputHovering = false">
        <template slot="suffix">
          <i v-show="!showClose" :class="['el-select__caret', 'el-input__icon', 'el-icon-arrow-up']"></i>
          <i v-if="showClose" class="el-select__caret el-input__icon el-icon-circle-close" @click="handleClearClick"></i>
        </template>
      </el-input>
    </div>
    <el-dialog :title="title" :close-on-click-modal="false" :visible.sync="visible" class="JNPF-dialog JNPF-dialog_center transfer-dialog" lock-scroll append-to-body width="800px" :modal-append-to-body="false" @close="onClose">
      <div class="transfer__body">
        <div class="transfer-pane">
          <div class="transfer-pane__tools">
            <el-input placeholder="请输入关键词查询" v-model="pagination.keyword" @keyup.enter.native="search" clearable class="search-input">
              <el-button slot="append" icon="el-icon-search" @click="search"></el-button>
            </el-input>
          </div>
          <div class="transfer-pane__body left-pane">
            <el-tabs v-model="activeName" class="transfer-pane__body-tab hasSys-tab" v-if="selectType==='all'">
              <el-tab-pane label="部门" name="department">
                <el-tree :data="treeData" :props="props" check-on-click-node :expand-on-click-node="false" @node-click="handleNodeClick" :default-expanded-keys="defaultExpandedKeys" class="JNPF-common-el-tree" node-key="id" v-loading="loading" lazy :load="loadNode" v-if="!this.isAsync">
                  <span class="custom-tree-node" slot-scope="{ node, data }" :title="node.label">
                    <i :class="data.icon"></i>
                    <span class="text">{{node.label}}</span>
                  </span>
                </el-tree>
                <div v-if="this.isAsync" ref="infiniteBody" v-loading="loading && pagination.currentPage==1" class="single-list">
                  <template v-if="treeData.length">
                    <div v-for="(item,index) in treeData" :key="index" class="selected-item-user" @click="handleNodeClick(item)">
                      <div class="selected-item-main">
                        <el-avatar :size="36" :src="define.comUrl+item.headIcon" class="selected-item-headIcon">
                        </el-avatar>
                        <div class="selected-item-text">
                          <p class="name">{{item.fullName}}</p>
                          <p class="organize" :title="item.organize">{{item.organize}}</p>
                        </div>
                      </div>
                    </div>
                  </template>
                  <el-empty description="暂无数据" :image-size="120" v-else></el-empty>
                </div>
              </el-tab-pane>
              <el-tab-pane v-if="multiple" label="角色" name="role">
                <el-tree :data="treeData2" :props="props" :expand-on-click-node="false" default-expand-all check-on-click-node @node-click="handleNodeClick" class="JNPF-common-el-tree" node-key="id" v-loading="roleLoading" ref="roleTree" :filter-node-method="filterNode">
                  <span class="custom-tree-node" slot-scope="{ node, data }" :title="node.label">
                    <i :class="data.icon"></i>
                    <span class="text">{{node.label}}</span>
                  </span>
                </el-tree>
              </el-tab-pane>
              <el-tab-pane v-if="multiple" label="岗位" name="position">
                <el-tree :data="treeData3" :props="props" :expand-on-click-node="false" default-expand-all check-on-click-node @node-click="handleNodeClick" class="JNPF-common-el-tree" node-key="id" v-loading="positionLoading" ref="positionTree" :filter-node-method="filterNode">
                  <span class="custom-tree-node" slot-scope="{ node, data }" :title="node.label">
                    <i :class="data.icon"></i>
                    <span class="text">{{node.label}}</span>
                  </span>
                </el-tree>
              </el-tab-pane>
              <el-tab-pane v-if="multiple" label="分组" name="group">
                <el-tree :data="treeData4" :props="props" :expand-on-click-node="false" default-expand-all check-on-click-node @node-click="handleNodeClick" class="JNPF-common-el-tree" node-key="id" v-loading="groupLoading" ref="groupTree" :filter-node-method="filterNode">
                  <span class="custom-tree-node" slot-scope="{ node, data }" :title="node.label">
                    <i :class="data.icon"></i>
                    <span class="text">{{node.label}}</span>
                  </span>
                </el-tree>
              </el-tab-pane>
            </el-tabs>
            <template v-if="selectType === 'custom'">
              <div class="custom-title">全部数据</div>
              <div ref="infiniteBody" v-loading="loading && pagination.currentPage==1" class="single-list">
                <template v-if="ableList.length">
                  <div v-for="(item,index) in ableList" :key="index" class="selected-item-user" @click="handleNodeClick(item)">
                    <div class="selected-item-main">
                      <el-avatar :size="36" :src="define.comUrl+item.headIcon" class="selected-item-headIcon">
                      </el-avatar>
                      <div class="selected-item-text">
                        <p class="name">{{item.fullName}}</p>
                        <p class="organize" :title="item.organize">{{item.organize}}</p>
                      </div>
                    </div>
                  </div>
                </template>
                <el-empty description="暂无数据" :image-size="120" v-else></el-empty>
              </div>
            </template>
          </div>
        </div>
        <div class="transfer-pane">
          <div class="transfer-pane__tools">
            <span>已选</span>
            <el-button @click="removeAll" type="text" class="removeAllBtn">清空列表</el-button>
          </div>
          <div class="transfer-pane__body shadow right-pane">
            <template v-if="(selectedData.length&&!multiple)||selectType == 'custom'">
              <div v-for="(item,index) in selectedData" :key="index" class="selected-item-user">
                <div class="selected-item-main">
                  <el-avatar v-if="item.type==='user'" :size="36" :src="define.comUrl+item.headIcon" class="selected-item-headIcon">
                  </el-avatar>
                  <div v-else class="selected-item-headIcon icon">
                    <i :class="item.icon"></i>
                  </div>
                  <div class="selected-item-text">
                    <p class="name">{{item.fullName}}</p>
                    <p class="organize" :title="item.organize">{{item.organize}}</p>
                  </div>
                  <i class="el-icon-delete" @click="removeData(index)"></i>
                </div>
              </div>
            </template>
            <template v-else-if="haveData&&multiple">
              <div v-for="(item,index) in selectedList" :key="index" class="selected-item-user-multiple">
                <template v-if="item.children.length">
                  <p class="selected-item-title">
                    <i :class="item.icon"></i><span>{{item.fullName}}</span>
                  </p>
                  <div v-for="(child,i) in item.children" :key="i" class="selected-item-main">
                    <el-avatar v-if="child.type==='user'" :size="36" :src="define.comUrl+child.headIcon" class="selected-item-headIcon">
                    </el-avatar>
                    <div v-else class="selected-item-icon">{{child.fullName.substring(0,1)}}</div>
                    <div class="selected-item-text">
                      <p class="name">{{child.fullName}}</p>
                      <p class="organize" :title="child.organize">{{child.organize}}</p>
                    </div>
                    <i class="el-icon-delete delete" @click="removeMulData(child.id)"></i>
                  </div>
                </template>
              </div>
            </template>
            <el-empty v-else description="暂无数据" :image-size="120"></el-empty>
          </div>
        </div>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setDefault(),visible=false">{{$t('common.cancelButton')}}</el-button>
        <el-button type="primary" @click="confirm">{{$t('common.confirmButton')}}</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  import { getImUserSelector, getSelectedList, getSelectedUserList } from '@/api/permission/user';
  import { addResizeListener, removeResizeListener } from 'element-ui/src/utils/resize-event';
  import emitter from 'element-ui/src/mixins/emitter';
  import { getPositionSelector } from '@/api/permission/position';
  import { getRoleSelector } from '@/api/permission/role';
  import { getGroupSelector } from '@/api/permission/group';

  let { methods: { dispatch } } = emitter
  const defaultSelectedList = [
    {
      id: "department",
      type: "department",
      fullName: "部门",
      icon: "icon-ym icon-ym-tree-department1",
      children: []
    },
    {
      id: "position",
      type: "position",
      fullName: "岗位",
      icon: "icon-ym icon-ym-tree-position1",
      children: []
    },
    {
      id: "user",
      type: "user",
      fullName: "用户",
      icon: "icon-ym icon-ym-tree-user2",
      children: []
    },
    {
      id: "group",
      type: "group",
      fullName: "分组",
      icon: "icon-ym icon-ym-generator-group1",
      children: []
    },
    {
      id: "role",
      type: "role",
      fullName: "角色",
      icon: "icon-ym icon-ym-generator-role",
      children: []
    }
  ]
  export default {
    name: 'JnpfUsersSelect',
    inject: {
      elForm: {
        default: ''
      },
      elFormItem: {
        default: ''
      }
    },
    props: {
      value: {
        type: [String, Array],
        default: ''
      },
      placeholder: {
        type: String,
        default: '请选择'
      },
      title: {
        type: String,
        default: '选择用户'
      },
      disabled: {
        type: Boolean,
        default: false
      },
      multiple: {
        type: Boolean,
        default: false
      },
      collapseTags: {
        type: Boolean,
        default: false
      },
      clearable: {
        type: Boolean,
        default: true
      },
      hasSys: {
        type: Boolean,
        default: false
      },
      selectType: {
        type: String,
        default: 'all'
      },
      ableIds: {
        type: Array,
        default: () => []
      },
      size: String,
    },
    data() {
      return {
        visible: false,
        activeName: '',
        nodeId: '',
        innerValue: '',
        loading: false,
        roleLoading: true,
        positionLoading: true,
        groupLoading: true,
        props: {
          children: 'children',
          label: 'fullName',
          isLeaf: 'isLeaf'
        },
        treeData: [],
        treeData2: [],
        treeData3: [],
        treeData4: [],
        ableList: [],
        selectedData: [],
        tagsList: [],
        inputHovering: false,
        inputWidth: 0,
        initialInputHeight: 0,
        isAsync: false,
        finish: false,
        pagination: {
          keyword: '',
          currentPage: 1,
          pageSize: 20,
        },
        selectedList: defaultSelectedList,
        haveData: false,
        defaultExpandedKeys: []
      }
    },
    watch: {
      value(val) {
        this.setDefault()
      },
      selectDisabled() {
        this.$nextTick(() => {
          this.resetInputHeight();
        });
      },
      activeName(val) {
        this.pagination.keyword = ''
        this.isAsync = false
        if (!val) return
        this.nodeId = '0'
        this.treeData = []
        this.getData()
      },
      selectedData(val) {
        if (!this.multiple) return
        this.selectedList = JSON.parse(JSON.stringify(defaultSelectedList))
        this.haveData = false
        for (let i = 0; i < this.selectedData.length; i++) {
          const item = this.selectedData[i];
          const type = item.type == 'company' ? 'department' : item.type
          this.selectedList.map(res => {
            if (res.type == type) {
              const obj = {
                fullName: item.fullName,
                type: type,
                headIcon: item.headIcon,
                organize: item.organize,
                id: item.id
              }
              res.children.push(obj)
              this.haveData = true
            }
          })
        }
      }
    },
    computed: {
      showClose() {
        let hasValue = this.multiple
          ? Array.isArray(this.value) && this.value.length > 0
          : this.value !== undefined && this.value !== null && this.value !== '';
        let criteria = this.clearable &&
          !this.selectDisabled &&
          this.inputHovering &&
          hasValue;
        return criteria;
      },
      currentPlaceholder() {
        if (this.multiple && Array.isArray(this.value) && this.value.length) {
          return ''
        } else {
          return this.placeholder
        }
      },
      selectDisabled() {
        return this.disabled || (this.elForm || {}).disabled;
      },
      _elFormItemSize() {
        return (this.elFormItem || {}).elFormItemSize;
      },
      selectSize() {
        return this.size || this._elFormItemSize || (this.$ELEMENT || {}).size;
      },
      collapseTagSize() {
        return ['small', 'mini'].indexOf(this.selectSize) > -1
          ? 'mini'
          : 'small';
      },
    },
    created() {
      this.setDefault()
      this.getOtherData()

    },
    mounted() {
      addResizeListener(this.$el, this.handleResize);
      const reference = this.$refs.reference;
      if (reference && reference.$el) {
        const sizeMap = {
          medium: 36,
          small: 32,
          mini: 28
        };
        const input = reference.$el.querySelector('input');
        this.initialInputHeight = input.getBoundingClientRect().height || sizeMap[this.selectSize];
      }
      if (this.multiple) {
        this.resetInputHeight();
      }
      this.$nextTick(() => {
        if (reference && reference.$el) {
          this.inputWidth = reference.$el.getBoundingClientRect().width;
        }
      });
      this.setDefault()
    },
    beforeDestroy() {
      if (this.$el && this.handleResize) removeResizeListener(this.$el, this.handleResize);
    },
    methods: {
      getAbleList() {
        this.loading = true
        let query = {
          pagination: this.pagination,
          ids: this.ableIds
        }
        getSelectedUserList(query).then(res => {
          if (res.data.list.length < this.pagination.pageSize) {
            this.finish = true
          }
          this.ableList = [...this.ableList, ...res.data.list]
          this.loading = false
        }).catch(() => {
          this.loading = false
        })
      },
      bindScroll() {
        let _this = this,
          vBody = _this.$refs.infiniteBody;
        vBody.addEventListener("scroll", function () {
          if (vBody.scrollHeight - vBody.clientHeight - vBody.scrollTop <= 200 && !_this.loading && !_this.finish) {
            _this.pagination.currentPage += 1
            if (_this.selectType === 'all') {
              _this.getAllList()
            }
            if (_this.selectType === 'custom') {
              _this.getAbleList()
            }
          }
        });
      },
      onClose() {
        this.activeName = ''
      },
      openDialog() {
        if (this.selectDisabled) return
        this.visible = true
        this.pagination.keyword = ''
        this.pagination.currentPage = 1
        this.nodeId = '0'
        this.isAsync = false
        this.finish = false
        this.selectedData = []
        if (this.selectType === 'all') {
          this.activeName = 'department'
          this.setDefault()
        }
        if (this.selectType === 'custom') {
          this.ableList = []
          this.getAbleList()
          this.$nextTick(() => {
            this.bindScroll()
            this.setDefault()
          })
        }
      },
      confirm() {
        if (this.multiple) {
          this.innerValue = ''
          this.tagsList = JSON.parse(JSON.stringify(this.selectedData))
          let selectedIds = this.selectedData.map(o => o.id)
          this.$emit('input', selectedIds)
          this.$emit('change', selectedIds, this.selectedData)
          dispatch.call(this, 'ElFormItem', 'el.form.change', selectedIds)
        } else {
          if (!this.selectedData.length) {
            this.innerValue = ''
            this.$emit('input', '')
            this.$emit('change', '', {})
            dispatch.call(this, 'ElFormItem', 'el.form.change', '')
            this.visible = false
            return
          }
          this.innerValue = this.selectedData[0].fullName
          let selectedIds = this.selectedData.map(o => o.id)
          this.$emit('input', selectedIds[0])
          this.$emit('change', selectedIds[0], this.selectedData[0])
          dispatch.call(this, 'ElFormItem', 'el.form.change', selectedIds[0])
        }
        this.visible = false
      },
      setDefault() {
        if (!this.value || !this.value.length) {
          this.innerValue = ''
          this.selectedData = []
          this.tagsList = []
          return
        }
        const arr = this.multiple ? this.value : [this.value]
        getSelectedList(arr).then(res => {
          this.selectedData = res.data.list.map(o => ({ ...o, id: o.type ? o.id + '--' + o.type : o.id }))
          if (this.multiple) {
            this.innerValue = ''
            this.tagsList = JSON.parse(JSON.stringify(this.selectedData))
          } else {
            this.innerValue = this.selectedData.length ? this.selectedData[0].fullName : ''
          }
          this.$nextTick(() => {
            if (this.multiple) {
              this.resetInputHeight();
            }
          });
        })
      },
      getData() {
        if (this.selectType === 'all') {
          if (this.activeName === 'department') {
            this.getAllList()
          } else if (['role', 'position', 'group'].includes(this.activeName)) {
            this.$refs[this.activeName + 'Tree'] && this.$refs[this.activeName + 'Tree'].filter(this.pagination.keyword)
          } else {
            this.loading = false
          }
        }
      },
      getOtherData() {
        this.roleLoading = true
        this.positionLoading = true
        this.groupLoading = true
        getRoleSelector().then(res => {
          this.treeData2 = res.data.list
          this.roleLoading = false
        })
        getPositionSelector().then(res => {
          this.treeData3 = res.data.list
          this.positionLoading = false
        })
        getGroupSelector().then(res => {
          this.treeData4 = res.data
          this.groupLoading = false
        })
      },
      search() {
        this.nodeId = '0'
        this.treeData = []
        this.pagination.currentPage = 1
        this.isAsync = !!this.pagination.keyword
        this.finish = false
        if (this.isAsync && this.activeName === 'department') {
          this.$nextTick(() => {
            this.bindScroll()
          })
        }
        if (this.selectType === 'all') {
          this.getData()
        } else {
          this.ableList = []
          this.getAbleList()
        }
      },
      filterNode(value, data) {
        if (!value) return true;
        return data[this.props.label].indexOf(value) !== -1;
      },
      getAllList() {
        this.loading = true
        if (this.pagination.keyword) this.nodeId = '0'
        getImUserSelector(this.nodeId, this.pagination).then(res => {
          if (this.pagination.keyword) {
            if (res.data.list.length < this.pagination.pageSize) {
              this.finish = true
            }
            this.treeData = [...this.treeData, ...res.data.list]
          } else {
            this.treeData = res.data.list
            if (!this.pagination.keyword && this.treeData.length && this.nodeId == '0') {
              this.defaultExpandedKeys = [this.treeData[0].id]
            }
          }
          this.loading = false
        })
      },
      loadNode(node, resolve) {
        if (node.level === 0) {
          this.nodeId = '0'
          return resolve(this.treeData)
        }
        this.nodeId = node.data.id
        getImUserSelector(this.nodeId).then(res => {
          resolve(res.data.list)
        })
      },
      handleNodeClick(data) {
        const usableList = this.multiple ? ['company', 'department', 'role', 'position', 'group', 'user'] : ['user']
        if (!usableList.includes(data.type)) return
        const boo = this.selectedData.some(o => o.id === data.id + '--' + data.type)
        let item = JSON.parse(JSON.stringify(data))
        item.id += '--' + item.type
        if (boo) return
        this.multiple ? this.selectedData.push(item) : this.selectedData = [item]
      },
      removeAll() {
        this.selectedData = []
      },
      removeData(index) {
        this.selectedData.splice(index, 1)
      },
      removeMulData(id) {
        const index = this.selectedData.findIndex((item) => {
          return item.id == id
        })
        if (index != -1) this.selectedData.splice(index, 1)
      },
      deleteTag(event, index) {
        this.selectedData.splice(index, 1)
        this.confirm()
        event.stopPropagation();
      },
      handleClearClick(event) {
        this.selectedData = []
        this.confirm()
        event.stopPropagation();
      },
      resetInputWidth() {
        this.inputWidth = this.$refs.reference.$el.getBoundingClientRect().width;
      },
      handleResize() {
        this.resetInputWidth();
        if (this.multiple) this.resetInputHeight();
      },
      resetInputHeight() {
        if (this.collapseTags) return;
        this.$nextTick(() => {
          if (!this.$refs.reference) return;
          let inputChildNodes = this.$refs.reference.$el.childNodes;
          let input = [].filter.call(inputChildNodes, item => item.tagName === 'INPUT')[0];
          const tags = this.$refs.tags;
          const tagsHeight = tags ? Math.round(tags.getBoundingClientRect().height) : 0;
          const sizeInMap = this.initialInputHeight || 40;
          input.style.height = this.selectedData.length === 0
            ? sizeInMap + 'px'
            : Math.max(
              tags ? (tagsHeight + (tagsHeight > sizeInMap ? 6 : 0)) : 0,
              sizeInMap
            ) + 'px';
        });
      },
      resetInputWidth() {
        this.inputWidth = this.$refs.reference.$el.getBoundingClientRect().width;
      },
      handleResize() {
        this.resetInputWidth();
        if (this.multiple) this.resetInputHeight();
      }
    },
  }
</script>